【摘要】 采用水池栽培水葱(ScirpustabernaemontaniGmel),研究了该植物对土壤中五氯酚(PCP)的生物富集能力。结果表明,供试污染土壤中五氯酚的起始浓度为2000.00μg.kg-1,经30、60、90、120d后种植水葱培养池土壤中五氯酚的含量分别为起始浓度的28.34%、1.03%、0.86%和0.088%;而对照未种植水葱的培养池土壤中五氯酚的含量分别为起始浓度的95.09%、81.17%、71.32%和63.75%;水葱根部五氯酚的含量由起始的579.55μg.kg-1,30d后达到最高富集量即2090.00μg.kg-1,由此证实水葱对五氯酚具有一定的富集能力。因此,利用水葱修复土壤中难降解有机污染物五氯酚是一项可行的技术。更多还原

【Abstract】 Phytoremediation is a cost-effective method to detoxify the contaminated soil by organic matter.The ability of Chinese shallot(Scirpus tabernaemontani Gmel)to bioaccumulate PCP from soil was investigated.When the initial fortification concentration was 2 000.00 μg·kg-1 in soil,the recovered residues of PCP in shallot-planted soil only accounted for 28.34% and 1.03% of the initial level at 30 and 60 days after treatment(DAT),respectively,and completely disappeared(>99.00%) after 90 days.In contrast,the concentrations of PCP in treatment without grown shallot represented 95.09%,81.17%,71.32% and 63.75% of the initial level at 30,60,90,and 120 DAT respectively.The dynamics of PCP could be well described by the first-order kinetic equation in both shallot-planted and unplanted treatment,and the correspondingly estimated half-lives were 11.83 days and 173.25 days,respectively.The PCP degradation in shallot-planted soil approximately was 15 times of that in unplanted soil.In addition,it was also monitored that PCP residue(579.55 μg·kg-1) in shallot root at the beginning of the experiment increased and reached the peak of 2 090.00 μg·kg-1 at 30 DAT.These results demonstrated that shallot had a high bioaccumulation capacity for PCP and could be used as a good alternative plant to remediate PCP-polluted soil or sediment in water system.更多还原